8-332 BLACK FKM 90D BACK-UP RING

Part number VBU90332 is an AS568-332 black Viton® (FKM) 90 Shore A Back-Up Ring built to an inside diameter of 2.35 in (59.69 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 2.77 in (70.36 mm). A back-up ring bridges the extrusion gap so the primary seal holds its shape under load.

It resists engine and transmission fluids, chlorinated solvents, and aromatic hydrocarbons. Viton® (FKM) offers the industry benchmark where nitrile reaches its thermal limit and outstanding high-temperature capability. Service temperature is rated from -15°F (-26.1°C) through 400°F (204.4°C). Exposure to amines or hot water and steam will shorten service life.

Typical settings include aerospace, high-temperature process equipment, and oil and gas.

Order part number VBU90332, sold individually. Unit weight is approximately 2.893 g and nominal inside diameter is listed as 2 3/8 inch. Check the compound against your process media, pressure and temperature before committing to a design. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.